patent · DE4103344A1
Solar system for heating water - consists of two separate transparent plastics bags containing water with heat exchanger between
13 August 1992
Indexed reference — no copy held
This patent is cited by material in the archive, so it is indexed here by number, title and inventor. The archive holds no copy of its text.
Provenance
- Collection
- Patents citing this work
- Patent office record
- patents.google.com →
- Source
- Google Patents citing-documents table
- Assignee
- Boettcher Alfred
- Published
- 1992-08-13